Color-printing.



J. RHEINBERG.

COLOR PRINTING.

APPLIOATION FILED APR. 17, 190e.

930,689 Patented Aug. 1o, 1909.

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JULIUS BILEINBERGr, OF LONDON, ENGLAND.

COLOR-PRINTING.

l Specification of Letters Patent.

Patented Aug. 10, 1909.

Application led April 17,1908. Serial No. 427,713.

To all whom it may concern:

Be it known that I, J ULIUs RHEINBERG, a subject of the King of GreatBritain, residing at London, England, have invented certain new anduseful Improvements Relating to Color-Printing, of which the followingis a specification.

This invent-ion relates to a method of obtaining widely varied coloreffects by printing in monochrome on paper or other material which issuitably prepared as hereinafter described.

The invention is a commercial application of a number of opticalprinciples.

unassisted eye.

contrast with one another are fused as above indicated, the resultingmixture will frequently contrast vividly with the component colorsthemselves, and will in general be of a decidedly lighter hue. Further,if. from any such color mixture, we can obliterate one or more of itscomponents, the color resulting will likewise contrast with the totalmixture, and will in general be of a deeperA hue. In applying theseprinciples I produce on paper or other material, lines, vdots orpatterns of various shapes, in ivarious colors and haphazardcolorations, in any desired regular sequence, and which when viewed fromthe correct distance exhibits, as already explained by optical fusion,the required ground tint. I now print on this paper or material, usingan impression surface which is similarly provided with lines or dots thepitch of which in the majority of cases is made to correspond to thepitch of the sets of color lines or dots on the surface to be printedupon, the said impression surface being supplied with an opaquepreferably dark ink or pigment.` Where these printed lines or dotsobliterate any of the color lines or dots of the paper, the latterassumes the hue resulting from the color mixture of the non-obliteratedcolors, which, as explained above, is deeper and contrasts with thegeneral hue. v l

In cases where the printing is effected with a colored pigment, thepaper assumes the hue resulting from the color mixture of the ob- -thepaper.' slightlyinclined to the color lines, bands of Vchanging colorsare produced. Moreover, two or'moresets of obliterating lines may 'beprinted on the color lines at dilferent angles, series of bands ofchanging colors. sets of obliterating lines different in pitchliterating with the non-obliterated colors. If for example the lines onthe paper are in suitably selected hues of red, green and blue occurringin succession, then the paper will appear gray, and if I vprint on thisin black with an impression surface or block the lines of which happento cover each of the green lines, leaving the other lines exposed, theresult will be that this printed portion of the paper will appear tohave a bluish-red or purple tint. Similarly if the red lines arecovered, the paper will appear blue green, and if the blue lines arecovered, the paper will appear orange red. If the obliterating lines donot correspond in pitch exactly with the sets ofcolor lines, forinstance if there :are 101 obliterating lines to 100 sets of colorlines, and supposing the obliterating and color lines to be perfectlyparallel, the effect will then be obtained of a band of color inapproximately the hues of the spectrum, extending over 100 sets of thecolor lines on If the obliterating lines are so as toproduce a double ortriple If two from the sets of color lines be printed at differentangles relatively to the color lines, lozenge shaped areas of changingcolors may be produced. By using radial lines on the impression surface,parabolic curves of changing colors may be obtained. In some cases,moreover, I may employ series of sinuous, wavy, or zigzag lines on theprinting block and straight color lines on the surface to be printedupon, or vice-versa, or both may be sinuous, wavy or zigzag.

In the accompanying drawing, I have indicated on a greatly magnifiedscale, one mode of carrying my invention into effect, using a series ofparallel straight color lines to form the ground tint, and a series ofobliterating parallel straight lines on the imof advertisement purposes,in magazines and journals, for book-covers, box-covers and linings, forshowcards, for Wall papers, for Woven materials, and fabrics, and manyother purposes of commerce and art.

What I claim is:

l. A process of producing color effects by printing in monochrome only,using an impression surface provided With lines or dots and printing onto material provided with color lines or dots arranged in sets in aregular sequence, the desired results be ing solely obtained by suitablerotational ad justment of the lines or dots on the impresf sion surfacein reference to the lines or dots on the material printed on.

2. A process of producing color effects by printing in monochrome only,using an impression surface provided with lines or dots and printing onto textile fabric having threads of different colors, in sets of regularsequence, the desired results being solely obtained by suitablerotational adjustment of the yimpression surface in reference to thefabric printed on.

3. A surface exhibiting multi-color designs of definite character but ofhaphazard co1- oration in any given part consisting of sets of lines ordots in monochrome printed at an. angle to and upon sets of color linesor dots substantially parallel to one another and arranged in sets in aregular sequence With which the aforesaid surface has been initiallyprovided.

4. A textile fabric surface exhibiting multi-color designs of definitecharacter but of haphazard coloration in any given part consisting ofsets of lines or dots in monochrome printed at an angle to and upon setsof color lines or dots substantially parallel to one another andarranged in sets in a regular sequence formed by the colored threadsused in Weaving the fabric.

In testimony whereof I have hereunto set my hand in presence of twosubscribing Witnesses.

JULIUS RHEINBERG. Witnesses R. D. LYNDE, A. V. IIOQKER.

